Association between blood circulating vitamin D and colorectal cancer risk in Asian countries: a systematic review and dose-response meta-analysis.

ABSTRACT:

Objectives

To assess the association between blood circulating vitamin D levels and colorectal cancer risk in the Asian population.

Design

This is a systematic review and dose-response meta-analysis of observational studies that investigated the relationship between blood circulating vitamin D levels and colorectal cancer risk in the Asian population.

Data sources

Relevant studies were identified through a literature search in Medline, Embase and Web of Science from 1st January 1980 to 31st January 2019. Eligibility criteria: original studies published in peer-reviewed journals investigating the association between blood circulating vitamin D levels and the risk of colorectal cancer and/or adenoma in Asian countries.

Data extraction and synthesis

Two authors in

SUBMITTER: Zhang L 

PROVIDER: S-EPMC7008426 | biostudies-literature | 2019 Dec

REPOSITORIES: biostudies-literature